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An effective way to address this issue is time series mining, in which the network traffic is naturally represented as a set of time series. In this paper, we propose a novel efficient algorithm, called RSFID (Random Shapelet Forest for Intrusion Detection), to detect abnormal traffic flow patterns in periodic network packets. Firstly, the Fast Correlation\u2010based Filter (FCBF) algorithm is employed to remove irrelevant features to decrease the overfitting as well as the time complexity. Then, a random forest which is built upon a set of shapelet candidates is used to classify the normal and abnormal traffic flow patterns. Specifically, the Symbolic Aggregate approXimation (SAX) and random sampling technique are adopted to mitigate the high time complexity caused by enumerating shapelet candidates. Experimental results show the effectiveness and efficiency of the proposed algorithm.<\/jats:p>","DOI":"10.1155\/2021\/4214784","type":"journal-article","created":{"date-parts":[[2021,9,3]],"date-time":"2021-09-03T22:35:43Z","timestamp":1630708543000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["An Effective Algorithm for Intrusion Detection Using Random Shapelet Forest"],"prefix":"10.1155","volume":"2021","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1312-6246","authenticated-orcid":false,"given":"Gongliang","family":"Li","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4326-583X","authenticated-orcid":false,"given":"Mingyong","family":"Yin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3476-0799","authenticated-orcid":false,"given":"Siyuan","family":"Jing","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0679-4601","authenticated-orcid":false,"given":"Bing","family":"Guo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2021,9,3]]},"reference":[{"key":"e_1_2_9_1_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jnca.2017.02.009"},{"key":"e_1_2_9_2_2","doi-asserted-by":"publisher","DOI":"10.1145\/382912.382914"},{"key":"e_1_2_9_3_2","first-page":"944","article-title":"A data mining based dos detection technique","volume":"29","author":"Gao N.","year":"2006","journal-title":"Chinese Journal of Computers"},{"key":"e_1_2_9_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0167-4048(02)00514-X"},{"key":"e_1_2_9_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.cose.2020.101863"},{"key":"e_1_2_9_6_2","doi-asserted-by":"publisher","DOI":"10.1007\/s10462-011-9293-z"},{"key":"e_1_2_9_7_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.eswa.2011.06.013"},{"key":"e_1_2_9_8_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00778-006-0002-5"},{"key":"e_1_2_9_9_2","doi-asserted-by":"publisher","DOI":"10.1109\/JIOT.2020.3002255"},{"key":"e_1_2_9_10_2","doi-asserted-by":"publisher","DOI":"10.1109\/TII.2019.2938778"},{"key":"e_1_2_9_11_2","doi-asserted-by":"publisher","DOI":"10.1109\/TII.2020.3038761"},{"key":"e_1_2_9_12_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.sigpro.2005.03.014"},{"key":"e_1_2_9_13_2","unstructured":"WeiL. 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